Noise Pollution Is Created If Noise Is In Excess To:(A) 40 - 65 dB.(B) 50 - 60 dB.(C) 70 - 75 dB.(D) 80 - 99 dB.

The correct answer is (D) 80 – 99 dB.

The audible range for hearing the sound by the human ear is 20 Hz-20 kHz.

The sounds which are above the level of 80 dB are considered as the source of noise pollution. There is damage to the ear cause at 85 dB and there is hearing loss at about 120 dB.

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